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以抗震设防7度区的某古石建筑移位后连接就位工程为研究背景,探讨了采用不同连接就位方式对古石建筑加固效果的影响,并运用有限元软件SAP2000建立三维实体模型,对采用传统连接就位和隔震连接就位的古石建筑移位后进行模态分析和时程分析。对比分析结果证明,隔震连接就位方式不仅可大幅延长结构自振周期,使其避开场地特征周期,还可以在一定程度上推迟扭转振型的出现,明显减小上部结构所受地震作用,从而起到良好的减震效果;此外,隔震支座饱满的滞后曲线反映了隔震层对地震起着良好的耗能作用,在一定程度上从能量的角度保证了移位古石建筑的安全性。
Taking the anti-seismic fortification 7 degree area of an ancient stone building as a displacement connection site after installation as a research background, this paper discusses the effect of adopting different connection methods on the reinforcement effect of the ancient stone building, and uses the finite element software SAP2000 to build a 3-D solid model, The ancient buildings in which the traditional connection is in place and the isolation connection is displaced undergo modal analysis and time history analysis. The results of comparative analysis show that the isolation and connection in place mode can not only greatly extend the natural period of the structure, but also avoid the characteristic period of the site. It can also delay the appearance of torsional modes to a certain extent and obviously reduce the earthquake effect on the superstructure In addition, the full hysteresis curve of the isolation bearings reflects that the seismic isolation layer plays a good role in energy dissipation and, to a certain extent, ensures that the displacement of the ancient stone buildings safety.